Retake both or just one?

I took both the SAT and ACT for the first time this summer and got 2000 on SAT and 32 on ACT. I feel like I do better on the ACT so should I just prep and retake the ACT this school year and ignore the SAT? Or do colleges like Stanford who require all scores to be sent look at your scores for both?

Take prep for the ACT, you seem to do better at that.